Cas-Ker CK-144 Wide (1.80mm) Double Flange Spring Bar Assortment box

Cas-Ker Stainless Steel Wide Double Flange Spring Bar Assortment CK-144, in box. There are 12 compartments filled with spring bars sized from 10mm to 22mm. Originally came with 144 pieces and I think it's reasonable to assume more that a few have been used, some sizes used more than others (12mm, 16mm & 18mm appear to have been popular), and I know refills are available from many sources. Box has seen some use and is cracked, but you're not likely buying it for the plastic box. Similar assortments retail for well over $30. Images do an adequate job of reprinting the item.